CVE - CVE-2024-26752

CVE-ID
CVE-2024-26752	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
In the Linux kernel, the following vulnerability has been resolved: l2tp: pass correct message length to ip6_append_data l2tp_ip6_sendmsg needs to avoid accounting for the transport header twice when splicing more data into an already partially-occupied skbuff. To manage this, we check whether the skbuff contains data using skb_queue_empty when deciding how much data to append using ip6_append_data. However, the code which performed the calculation was incorrect: ulen = len + skb_queue_empty(&sk->sk_write_queue) ? transhdrlen : 0; ...due to C operator precedence, this ends up setting ulen to transhdrlen for messages with a non-zero length, which results in corrupted packets on the wire. Add parentheses to correct the calculation in line with the original intent.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/0da15a70395182ee8cb75716baf00dddc0bea38d URL:https://git.kernel.org/stable/c/0da15a70395182ee8cb75716baf00dddc0bea38d MISC:https://git.kernel.org/stable/c/13cd1daeea848614e585b2c6ecc11ca9c8ab2500 URL:https://git.kernel.org/stable/c/13cd1daeea848614e585b2c6ecc11ca9c8ab2500 MISC:https://git.kernel.org/stable/c/359e54a93ab43d32ee1bff3c2f9f10cb9f6b6e79 URL:https://git.kernel.org/stable/c/359e54a93ab43d32ee1bff3c2f9f10cb9f6b6e79 MISC:https://git.kernel.org/stable/c/4c3ce64bc9d36ca9164dd6c77ff144c121011aae URL:https://git.kernel.org/stable/c/4c3ce64bc9d36ca9164dd6c77ff144c121011aae MISC:https://git.kernel.org/stable/c/804bd8650a3a2bf3432375f8c97d5049d845ce56 URL:https://git.kernel.org/stable/c/804bd8650a3a2bf3432375f8c97d5049d845ce56 MISC:https://git.kernel.org/stable/c/83340c66b498e49353530e41542500fc8a4782d6 URL:https://git.kernel.org/stable/c/83340c66b498e49353530e41542500fc8a4782d6 MISC:https://git.kernel.org/stable/c/c1d3a84a67db910ce28a871273c992c3d7f9efb5 URL:https://git.kernel.org/stable/c/c1d3a84a67db910ce28a871273c992c3d7f9efb5 MISC:https://git.kernel.org/stable/c/dcb4d14268595065c85dc5528056713928e17243 URL:https://git.kernel.org/stable/c/dcb4d14268595065c85dc5528056713928e17243
Assigning CNA
kernel.org
Date Record Created
20240219	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240219)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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